Navegando por Assunto "Barco"

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Acesso aberto (Open Access)
O Arranjo produtivo local dos construtores de barcos artesanais: fundamentos para o desenvolvimento endógeno do Baixo - Tocantins (PA)
(Universidade Federal do Pará, 2009) CORRÊA, Edson de Jesus Antunes; COSTA, Francisco de Assis; http://lattes.cnpq.br/1820238947667908
This work is a case study of Local Productive Arrangement - LPA of the hipbuilding industry in craftsmanship Igarapé-Miri region of the Low - Tocantins. This activity consists of sites managed by teachers employed owners of a body of tacit intellectual, passed from generation to generation. It aims to investigate the potential of LPA shipbuilding craft in support of endogenous development in the region. Therefore, we analyzed the main characteristics, structure of production, cost, employment, market and employment in small businesses of LPA in the shipping industry as well as the dynamics and potential of the sector, its main problems and barriers to its development. Thus, the survey found the increase in production tonnage of the shipping industry and the economic actors, political and social changes that it has benefited. The research adopted the methodological study of the experiences of learning system and seeking to understand innovation systems and local productive systems based on the evolutionary view of innovation and technological change.
Acesso aberto (Open Access)
Contribution to the marine propeller hydrodynamic design for small boats in the Amazon region
(Instituto Nacional de Pesquisas da Amazônia, 2016-03) FAVACHO, Breno Inglis; VAZ, Jerson Rogério Pinheiro; MESQUITA, André Luiz Amarante; LOPES, Fábio; MOREIRA, Antonio Luciano Seabra; SOEIRO, Newton Sure; ROCHA, Otávio Fernandes Lima da
In the Amazon, river navigation is very important due to the length of navigable rivers and the lack of alternative road networks. Boats usually operate in unfavorable conditions, since there is no hydrodynamic relation among propellers, geometry, and the dimensions of the boat hull. Currently, there is no methodology for propeller hydrodynamic optimization with low computational cost and easy implementation in the region. The aim of this work was to develop a mathematical approach for marine propeller design applied to boats typically found on Amazon rivers. We developed an optimized formulation for the chord and pitch angle distributions, taking into account the classical model of Glauert. A theoretical analysis for the thrust and torque relationships on an annular control volume was performed. The mathematical model used was based on the Blade Element Momentum Theory (BEMT). We concluded that the new methodology proposed in this work demonstrates a good physical behavior when compared with the theory of Glauert and the experimental data of the Wageningen B3-50 propeller.